Mass Spectrometry Ontology	Cell Ontology	Source
http://purl.obolibrary.org/obo/PR_000000001	http://purl.obolibrary.org/obo/MS_1000882	LOOM
http://purl.obolibrary.org/obo/PR_000027795	http://purl.obolibrary.org/obo/MS_1001251	LOOM
http://purl.obolibrary.org/obo/UBERON_0003037	http://purl.obolibrary.org/obo/MS_1000068	LOOM